Attach6_FOH_Mold_Remediation_5_20_2016.pdf

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DEPARTMENT OF HEALTH & HUMAN SERVICES Federal Occupational Health Service

Division of Environmental Health Services 1301 Young Street, Suite 772

Dallas, Texas 75202

MOLD ASSESSMENT REPORT/MOLD PROTOCOL REPORT

UNITED STATES DEPARTMENT OF AGRICULTURE (USDA)

ANIMAL AND PLANT HEALTH INSPECTION SERVICE (APHIS)

PLANT PROTECTION AND QUARANTINE (PPQ)

MEXICAN FRUIT FLY REARING FACILITY (MFFRF)

MOORE AIRBASE BUILDING 6407

22675 N. MOOREFIELD ROAD

EDINBURG, TEXAS 78541

PREPARED BY:

U.S. PUBLIC HEALTH SERVICE

FEDERAL OCCUPATIONAL HEALTH

ENVIRONMENTAL HEALTH SERVICES

1301 YOUNG STREET, SUITE 772

DALLAS, TEXAS 75202

TEXAS MOLD ASSESSMENT CONSULTANT #1066

SCOTT W. FONTENAROSA

EXPIRES 08/18/2016

Scott W. Fontenarosa

DATE PREPARED:

May 20, 2016

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USDA APHIS PPQ March 7, 2016 Mexican Fruit Fly Rearing Facility (MFFRF) Moore Airbase Building 6407 22675 N. Moorefield Road Edinburg, Texas 78541

I. EXECUTIVE SUMMARY

At the request of the United States Department of Agriculture (USDA), Animal and Plant Health Inspection Service (APHIS) Plant Protection and Quarantine (PPQ), the U.S. Public Health Service (USPHS), Federal Occupational Health Service (FOH) conducted a follow-up Mold Assessment at the Mexican Fruit Fly Rearing Facility (MFFRF), located at Moore Airbase Building 6407, 22675 N. Moorefield Road in Edinburg, Texas.

FOH Industrial Hygienist/Mold Assessor Mr. Scott W. Fontenarosa performed this task under an Interagency Agreement established with the USPHS/FOH and APHIS. The assessment was prompted due to the original Mold Assessment being out of date (December 2014). The purpose of this assessment was to determine the locations and amount of mold growth so they can be detailed in a Mold Protocol Report. The Mold Protocol will be used to develop a Work Plan for mold remediation. In addition, rodent dropping locations were identified so they can also be included in the remediation project.

II. INTRODUCTION

The Mexican Fruit Fly Rearing Facility (MFFRF) is a one story 28,000 square feet building used by APHIS personnel for the rearing and production of Mexican Fruit Flies. Sterile fruit fly pupae are held under controlled conditions for adult emergence prior to release. The facility rears up to 134.2 million; sterile fruit fly pupae per week. Building rooms are operated under various environmental conditions that are conducive for fruit fly rearing and production but are not ideal for human comfort, and without adequate building cleaning some rooms are prone to mold and bacteria growth because of these environmental conditions.

There are currently no U.S. federal laws that regulate and specifically address indoor mold growth. Without regulations, agencies such as the U.S. Environmental Protection Agency (EPA) have issued guidance on indoor mold growth. In 2001, The EPA published “Mold Remediation in Schools and Commercial Buildings”. This document offers guidance on Indoor Environmental Assessment and remediation techniques and was followed in 2002 by a guideline directed to residents that specifically addressed mold in homes. ”A Brief Guide to Mold Moisture and Your Home.” The U.S. Occupational Safety and Health (OSHA) issued an advisory on mold remediation. This advisory is not a standard, nor should it be interpreted to mean that the general duty clause should necessarily be used to enforce the advisory. It is simply a guidance document that asks the reader to follow the principles outlined in the EPA documents and lists specific remediation procedures that were adopted from “New York City Department of Health (NYCDOH) Guidelines on the Assessment and remediation of fungi in Indoor Environment”. State and local public health agencies are authorized to abate public nuisances. Specific references to mold as a public nuisance are limited. Responses by public health agencies to complaints of mold vary from state to state and locality to locality because of the difference of opinion on whether indoor mold growth constitutes a public nuisance. Although indoor mold growth may adversely affect the health of certain individuals, whether it is a public health nuisance is still a question. Mold often affects a limited area, frequently impacting a single building, and not necessarily affecting the health of persons occupying the building. Effective May 2004 the State of Texas requires the licensing of Indoor Environmental Assessment and remediation workers and directs the Texas Board of Health to establish minimum performance standards and work practices for conducting Indoor Environmental Assessment and remediation and establishes rules regarding the training, qualifications, and continuing education required of license holders.

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It further directs the Texas Department of Health to conduct a statewide education and outreach program regarding ways to recognize, prevent, control, and mitigate mold occurrence and indoor air quality factors that adversely affect human health; and investigate any complaint regarding mold-related activities and ensure compliance with established performance standards, work practices, and licensing. This law exempts building owners, managers, and tenants from compliance when assessing and remediating small areas of mold, defined as less than 25 contiguous square feet. Therefore, it is important not to let surface mold growth exceed 25 square feet or Texas licensed mold workers will need to be used to perform the remediation of mold.

Presently in-house cleaning staff is used to clean mold from surfaces as it accumulates.

The FOH assessment included a detailed assessment of all rooms/areas, including ceiling plenum spaces in the facility to identify and assess mold growth and damp building materials as well as other environmental conditions (rodent droppings) that may affect the health of building occupants and to provide a mold remediation protocol in accordance with the Texas Mold Assessment and Remediation Rules (TMARR) based upon visual/analytical findings of the site visit.

III. AFFECTED AREAS AND MATERIALS

General Findings and Discussion Mold growth typically requires a food source and moisture (humidity above 65%) to grow. Most building surfaces within the facility are hard and non-porous and are typically ideal for preventing mold growth if kept clean.

Ceilings are smooth surface cement-like panels or vinyl panels (there are a few metal and cellulous tiles); walls are mostly painted concrete cement block, ceramic tile, or vinyl panels (there are some. These are all inorganic materials that do not provide a food source for mold and do not retain moisture well. However, surface particulates, dust, fruit fly/larvae food mixture, and fruit fly and rodent feces (organic materials) that accumulate on these surfaces provide food sources for mold. Conditions maintained in the building to provide ideal rearing conditions for fruit flies contribute to high humidity conditions in the building that lead to mold growth. In addition, condensation leaks and water introduced to most areas of the building from wash rooms and washing down walls and floors increases moisture levels in the building. Since the building temperatures and relative humidity levels cannot be altered without affecting the fruit fly rearing process, good housekeeping procedures need to be strictly followed. Pipes and ducts should be adequately insulated to prevent/reduce condensation leaks. Building materials such as painted ceiling tiles in areas that are prone to mold growth should be replaced or cleaned and re-painted with an anti-microbial paint such as Foster 40-20. These measures should reduce and control mold growth.

Rodent dropping and rodent urine stains were found in all accessible ceiling plenum spaces. Remediation of rodent droppings and urine should be addressed during the remediation at least where mold was identified.

Room 1 Front office/meeting room - Approximately 168 square feet The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is vinyl floor tile. Visible mold was observed on the air supply vent. Three cement-like ceiling tile panels have staining. May be rodent urine or mold. In the ceiling plenum space there is a significant amount of debris and rodent droppings.

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Room 2 Admin hallway- Approximately 193 square feet The admin hallway is adjacent to the front office/meeting room, admin office, facility director office, restrooms, and locker rooms. The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is vinyl floor tile. Visible mold was observed on the air supply vents and the air return vent is dusty. Ceiling tiles along the edges and ceiling tile metal grid have visible mold growth. The ceiling plenum space above has large ducts lined with fiberglass foil insulation (square and round) that have surface mold on them. It was difficult to determine the amount of mold on these ducts due to accessibility. There is at least 5 square feet. Significant visible mold was also observed on a fiberglass insulated pipe (10-inch diameter and 6 linear feet in length). There is a significant amount of debris and rodent dropping on top of the ceiling tiles. The air handler unit suspended in the ceiling plenum above this space has mold on the outer surfaces. The bottom of the secondary condensate pan has white mold growth. The secondary pan has a large accumulation of debris, rust, and rodent droppings. The pvc 1-inch drain line is covered with mold. The internal housing areas of the air handler unit were not assessed for mold due to limited accessibility. Remediation of the air handler unit should be part of the remediation project. Any mold found on air filters, coils, fan/motor, internal housing areas and lining should be remediated.

Room 3 Admin office - 120 square feet The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is vinyl floor tile. Three ceiling tiles are stained. Visible mold was observed on the air supply vent and return air vent. In the ceiling plenum space there is a moderate amount of rodent droppings.

Significant visible mold was also observed on a fiberglass insulated pipe (10-inch diameter pipe and 14 linear feet in length). This is the same pipe observed in the admin hallway.

Room 4 Admin office Facility Director - 120 square feet The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is vinyl floor tile. There was no staining or visible mold growth on ceiling tiles.

Visible mold was observed on the air supply vent. In the ceiling plenum space there is a moderate amount of rodent droppings. No suspect mold or excess moisture was observed in the ceiling plenum space.

Room 5 Women restroom – 45 square feet The women restroom ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The upper walls are painted cinder block and lower walls are ceramic tile. Floors are ceramic tile. There is approximately 45 square feet of suspect mold on the surface of the ceiling tiles, ceiling tile metal grid, and air vent. The plenum space above has a moderate amount of debris and rodent droppings. No suspect mold or excess moisture was observed in the ceiling plenum space (excluding ceiling tiles and grid).

Room 6 Men restroom – 25 square feet The men restroom ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white.

The upper walls are painted cinder block and lower walls are ceramic tile. Floors are ceramic tile. There is approximately 25 square feet of suspect mold on the surface of the ceiling tiles, ceiling tile metal grid, and air vent. The plenum space above has a moderate amount of debris and rodent droppings. No suspect mold or excess moisture was observed in the ceiling plenum space (excluding ceiling tiles and grid).

Room 7 Locker Room Hall– 48 square feet In this area the ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is vinyl floor tile. The edges of the ceiling tiles and metal ceiling tile grids have visible mold. A pvc condensate drain line (from the air handler in the admin hallway plenum space) is covered with mold. The ceiling plenum space has a significant amount of debris and rodent droppings.

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Room 8 Locker Room Foyer– 24 square feet In this area the ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is vinyl floor tile. The ceiling tiles show no staining or mold growth.

There is a moderate amount of rodent droppings in the ceiling plenum space.

Room 9 Locker Room - 80 square feet The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is ceramic tile. There was no staining or visible mold growth on ceiling tiles.

In the ceiling plenum space there is a moderate amount of rodent droppings. No suspect mold or excess moisture was observed in the ceiling plenum space.

Room 10 Men Locker Room - 108 square feet The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is ceramic tile. Four ceiling tiles have visible mold. The metal air supply vent is covered with mold. The ceiling plenum space has a moderate amount of debris and rodent droppings.

Room 11 Main Larva Room (Sifting)- Approximately 1600 square feet This room is also known as the Diet mixing room. A large mixer in this room generates larva food dust, some of which may be settling-out in the ceiling plenum space and providing a food source for bacteria and mold growth. The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white.

The walls are painted cinder block and the floor is unfinished concrete. Exposed metal duct outside the ceiling plenum space that runs along the east wall just below the ceiling shows rusting which is an indication of long term leaking condensation or high humidity. Mold that was identified on this duct in the previous mold assessment has been removed. Mold was observed at the edges of most ceiling tiles in this room and on the metal ceiling tile grids. Cleaning procedures has kept easily accessible mold on the ceiling tiles under control but not at the edges or in the ceiling plenum space. Water (condensate) is leaking from uninsulated pipes in the ceiling plenum resulting in mold growth. Uninsulated piping is covered with microbial growth. The top plenum side of ceiling tiles has a significant amount of microbial growth, mold, condensate, rodent droppings and debris on almost the entire area above the ceiling. Insulated duct and piping in the ceiling plenum space also have visible surface mold growth. The amount of visible mold in the plenum space on insulated pipes and ducts is hard to determine due to limited access but at least 50 square feet of will need to be cleaned to remediate the mold. Ceiling tile and metal ceiling tile grid will need to be removed to gain access to clean ducts and piping.

Room 12 Larval Hall There was no visible mold or rodent droppings in this hallway. The ceiling is covered with vinyl paneling that are fixed. There is a ceiling hatch to gain access to plenum space. The plenum space has a wood floor and houses air handler units that service the four larval rooms. This area was clean and dry with no evidence of mold, moisture, or rodent droppings.

Room 13 Larval Room #1 There was no visible mold or rodent droppings in this room. This area was clean and dry with no evidence of mold, moisture, or rodent droppings.

Room 14 Larval Room #2- Approximately 600 square feet The ceiling is covered with fixed vinyl paneling. Approximately 10%-15% of the ceiling has visible mold. There is access to the ceiling plenum through two small hatches but they were sealed with screws. There is no evidence of rodent droppings. The door frame casing is missing and there is visible mold growth on the exposed wallboard.

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Room 15 Larval Room #3- Approximately 600 square feet The ceiling is covered with fixed vinyl paneling. Approximately 1%-2% of the ceiling has visible mold. There is access to the ceiling plenum through two small hatches but they were sealed with screws. There is no evidence of rodent droppings. The mold on the ceiling can be cleaned by in-house staff with a mild soap and water mixture. The door frame casing is missing and there is visible mold growth on the exposed wallboard.

Room 16 Larval Room #4 There was no visible mold or rodent droppings in this room. This area was clean and dry with no evidence of mold, moisture, or rodent droppings.

Room 17 Mixing Room The mixing room is open to the outdoors when in operation and large exhaust fans are set up to exhaust air to the outdoors. The ceiling is open to the roof deck. There was no evidence of visible mold growth or rodent droppings in this room.

Room 18 Sump Pump Room This room showed no evidence of mold growth or rodent droppings.

Room 19 Infest Room Approximately 600 square feet The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is unfinished concrete. No visible mold was observed on ceiling tile panels.

In the ceiling plenum space there is a moderate amount of rodent droppings.

Room 20 Larva Wash Room Approximately 400 square feet The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is unfinished concrete. Mold was observed on six ceiling tiles in this room.

The ceiling plenum space has a moderate amount of debris and rodent droppings.

Room 21 Mechanical Room hall

This area is partially screened in from the outdoors and there is an overhead door at the end of the hall. The ceiling is open to the roof deck. Walls are wallboard with vinyl base cove. The floor is bare concrete. Water generated during washing trays in the wash room has been draining into this hall along the wallboard wall. The lower six inches of this wall was found to be wet and mold was found under the vinyl base cove. A channel to capture and divert water away from the hall has been cut into the concrete floor but is insufficient to catch all the water that flows from the wash room. Approximately 13 linear feet of wallboard and vinyl base cove needs to be removed from the hall wal l to a height of two feet to adequately remediate water damaged and mold. There is also a roof leak that is resulting in water draining down the walls between the hallway and boiler room. The upper wall shows small areas of mold growth. Approximately 4 square feet of wallboard needs to be removed to remediate the mold in this area.

Room 22 Mechanical Boiler room

The boiler room ceiling is open to the roof deck. The walls are brick and mortar and wallboard with vinyl base cove. The floor is unfinished concrete. A condensate dra in line from the wash room is draining into the boiler room onto the floor and along the brick and wallboard walls. Also water from the wash room is draining into the adjacent hall to the boiler room. The water has been wicking-up the wallboard walls. The lower six inches of the wall was found to be wet. Mold was found under the vinyl base cove on the wallboard wall.

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Approximately 23 linear feet of wallboard and vinyl base cove needs to be removed to a height of two feet to adequately remediate water damaged and mold. As mentioned there is also a roof leak that is resulting in water draining down the walls between the hallway and mechanical boiler room. The upper wall shows small areas of mold growth. Approximately 4 square feet of wallboard needs to be removed to remediate the mold in this area.

Room 23 Colony Wash Room There was no visible mold or rodent droppings in this room. This area was clean and dry with no evidence of mold, moisture, or rodent droppings.

Room 24 Colony Bubbling Room- Approximately 200 square feet In this area the ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is vinyl floor tile. The ceiling tiles show no staining or mold growth.

There is a moderate amount of rodent droppings in the ceiling plenum space.

Room 25 Colony Room In this area the ceiling is fixed vinyl panels. The walls are painted cinder block and the floor is concrete. The ceiling showed no staining or mold growth. Access to the ceiling plenum space through a storage room hatched showed the plenum space above to have a wooden floor that was clean and dry with no evidence of mold, moisture, or rodent droppings. Air handler units in this space were in good condition.

Room 26 Colony Storage room This room showed no evidence of mold, moisture, or rodent droppings.

Room 27 Storage room This room showed no evidence of mold, moisture, or rodent droppings

Room 28 Office This room showed no evidence of mold, moisture, or rodent droppings

Room 29 Restroom This restroom showed no evidence of mold, moisture, or rodent droppings

Room 30 Restroom This restroom showed no evidence of mold, moisture, or rodent droppings

Room 31 Larval Storage This is a new room- a wall was installed between it and the Colony Wash room. This room showed no evidence of mold, moisture, or rodent droppings. There was debris in the ceiling plenum space.

Room 32 Red Room Approximately 128 square feet

Visible surface mold was observed on three cement-like ceiling tile panels and two adjacent metal ceiling air vents. The plenum space above has a significant amount of debris, mold, and rodent droppings on top of the ceiling tile the entire area above the ceiling. There is an air handler suspended above in the ceiling plenum space. The internal housing areas of the air handler unit were not assessed for mold due to limited accessibility. Remediation of the air handler unit should be part of the remediation project. Any mold found on air filters, coils, fan/motor, internal housing areas and lining should be remediated.

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Room 33 Dump and Dye Room In this area the ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The walls are painted cinder block and the floor is ceramic tile. The ceiling tiles show no staining or mold growth.

There is a small amount of rodent droppings in the ceiling plenum space.

Room 34 Vacuum Radiation Room/Storage 70 square feet A large Torit Vacuum occupies most of this room. The air supply metal vent and one ceiling tile have visible mold growth. Other cement-like ceiling tiles show no staining or mold growth. There is a small amount of debris and rodent droppings in the ceiling plenum space.

Room 35 Irradiation office 96 square feet There is mold on the edges of all ceiling tile including the metal ceiling tile grid and on the metal ceiling air vents. The plenum space above has fiberglass insulation which severely limited the visibility. It is suspected that there is debris, mold, and rodent droppings on top of the ceiling tile.

Room 36 Pupae Holding Room In this area the ceiling is fixed vinyl panels. The walls are painted cinder block and the floor is ceramic tile. The ceiling showed no staining or mold growth. Access was not gained to the ceiling plenum space above this room but it is not suspected to have mold growth.

Room 37 Sausage room 144 square feet Visible surface mold was observed on several cement-like ceiling tile panels. There is significant mold on the edges of all ceiling tile including the metal ceiling tile grid and on metal ceiling air vents. The plenum space above has fiberglass insulation which severely limited the visibility. It is suspected that there is significant amount of debris, mold, and rodent droppings on top of the ceiling tile the entire area above the ceiling.

Room 38 Irradiation Room 192 square feet The walls are painted cinder block and the floor is ceramic tile. The cement-like ceiling tiles show no staining or mold growth. There is a large amount of debris and rodent droppings in the ceiling plenum space.

Room 39 ERF Receiving The walls are painted cinder block and the floor is ceramic tile. The cement-like ceiling tiles show no staining or mold growth. There is debris and rodent droppings in the ceiling plenum space.

Room 40 knock down room 345 square feet The knock down room is a refrigerated room. The ceiling and walls are vinyl paneling that has a rough textured surface that has been painted. During the initial mold assessment mold was found imbedded into the ceiling and wall vinyl panels. Mold covered most of the ceiling and walls. During this assessment the mold was no longer present. It was reported that the walls and ceiling undergo continual cleaning with bleach.

Room 41 ERF Room, Room 41A rest room 41B storage, and ERF Office 1620 square feet The ceiling in these rooms is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white.

The walls are painted cinder block and the floor is 12”X12” ceramic tile. Mold was observed on the metal ceiling tile grid and edges of most of the ceiling tiles. The ceiling plenum space has rodent droppings and debris on top of the ceiling tiles. Mold was also observed on insulated piping and ducts. The square footage of mold on pipes and ducts was difficult to determine- a best guess estimate is approximately 50 square feet.

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Room 42 QC Room The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. Walls are cinderblock and the floor is ceramic tile. This room showed no evidence of mold growth including in the ceiling plenum space. Rodent droppings were present in the plenum space.

Room 43 Larvae Manager office The ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. Walls are cinderblock and the floor is ceramic tile. This room showed no evidence of mold growth including in the ceiling plenum space. Rodent droppings were present in the plenum space.

Room 44 Restroom 25 square feet The restroom ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The upper walls are painted cinder block and lower walls are ceramic tile. Floors are ceramic tile. There is approximately 25 square feet of suspect mold on the surface of the ceiling tiles and ceiling tile metal grid. The plenum space above has debris and rodent droppings. The exhaust vent has mold growth.

Room 45 Restroom 25 square feet The restroom ceiling is metal grid with lay-in 2’ x 4’ cement-like ceiling tile panels that are painted white. The upper walls are painted cinder block and lower walls are ceramic tile. Floors are ceramic tile. There is approximately 25 square feet of suspect mold on the surface of the ceiling tiles and ceiling tile metal grid. The plenum space above has debris and rodent droppings. The exhaust vent has mold growth.

Room 46 ERF Wash room This room showed no evidence of mold, moisture, or rodent droppings.

Room 47 Exterior Storage No access

The following specifications for mold remediation were prepared using the guidance established by the New York City Department of Health and Mental Hygiene “Guidelines on Assessment and Remediation of Fungi in Indoor Environments” and the U.S. Environmental Protection Agency’s “Mold Remediation in Schools and Commercial Buildings” and “Bioaerosol Assessment and Control” handbook developed by the American Conference of Governmental Industrial hygienist (ACGIH) as well as adherence to good industrial hygiene practice and professional judgment for the removal of contaminated building materials identified within government occupied office space. This document has been written to address the remediation of mold contaminated vinyl wall covering and concrete plaster walls. This specification does not address re-installation of the new materials or remediating the source of the moisture intrusion into the facility.

Compliance with all applicable State regulations is required. These regulations include, but are not limited to:

Texas- Mold Remediation in the State of Texas is regulated under Title 25 Health Services, Part 1 Department of State Health Services, Chapter 295 Occupational Health, Sub-chapter J Texas Mold Assessment and Remediation Rules.

The mold remediation project for the USDA APHIS Mexican Fruit Fly Rearing Facility (MFFRF), located at Moore Airbase Building 6407, 22675 N. Moorefield Road in Edinburg, Texas is for the removal and/or surfacing cleaning of mold contaminated ceiling, wall, pipes, ducts, and ceiling plenum materials. Materials that are to be removed are listed in the table below.

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FOH recommends HEPA vacuuming the ceiling plenum space, cleaning mold/bacteria, rodent urine and droppings, and debris from ceiling tiles (or replacing) and surface cleaning insulated pipes, ducts, and air handler units suspended in the ceiling plenum space with an EPA approved sanitizer then encapsulating with an encapsulant such as Foster 40-20 which will inhibit mold growth. Duct and pipe Insulation that is damaged will need to be replaced. Cement-like ceiling tiles should be replaced if mold is embedded and cannot be cleaned.

Ceiling tiles will have to be removed in order to adequately clean ceiling tiles and ceiling tile grids in most areas.

Removal of ceiling tiles and grid will allow for better access to piping, ducts, and air handler units. It is not recommended to clean ceiling tiles in place. Rodents have urinated on the tiles so they need to be power washed if the tiles are to be reused. Rooms with vinyl ceiling tiles that are fixed and have mold growth can be surfaced cleaned in place. Metal air vents throughout the building can be surface cleaned using a mild soap and water or EPA approved cleaner/sanitizer.

Room Mold Affected Materials/Items Minimum Amount of Material to be removed or cleaned

Room 1 Office/Meeting Room

Air supply air vent

Cement-like ceiling tile panels Stained Ceiling tiles

Ceiling tile metal grid

Remove and replace one air supply vent

Ceiling tile and grid - Remove, discard and replace in kind all (168 square feet) ceiling tiles. Clean or replace ceiling tile grid.

HEPA vacuum rodent droppings and remove debris from plenum space.

Room 2 Admin hallway

Air supply and return air vents

Insulated pipe

Insulated Duct

Air Handler unit pvc piping

Remove and replace two air supply vents and one return air vent.

(193 square feet) ceiling tiles and grid. HEPA vacuum rodent droppings and remove debris from the ceiling plenum space.

Remove approximately 10-inch diameter and 6 linear feet of insulated pipe and replace.

Remove and replace all insulation (5 square feet is mold contaminated duct insulation).

Air Handler suspended in ceiling plenum space- HEPA vacuum and surface clean exterior and interior including primary and secondary condensation pans evaporator coils, air filter housing, fan, motor, and lining-housing areas.

Clean pvc condensation drain line- approximately 10 linear feet

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Room 3

Admin office

Air supply and return air vents

Remove and replace one air supply vent and one return air vent

(120 square feet) ceiling tiles. Clean or replace ceiling tile grid.

HEPA vacuum rodent droppings and remove debris from plenum space.

Remove and replace all insulation (mold impacted insulation on 10-inch diameter pipe 14 -linear feet in length)

Room 4 Facility Director

Admin office

Ceiling plenum

Remove and replace one air supply vent that has mold growth.

ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings and remove debris from plenum space. (120 square feet).

Room 5

Women restroom

Air exhaust vent

Remove and replace exhaust vent

(120 square feet) ceiling tiles. Clean or replace ceiling tile grid.

plenum space. (45 square feet).

Room 6

Men restroom

Air exhaust vent

Remove and replace exhaust vent r

Remove and replace in kind 25 square feet of ceiling tile and ceiling grid. HEPA vacuum and remove debris from the ceiling plenum.

Room 7 Locker room hall

PVC HVAC drain line

Remove and replace in kind 48 square feet of ceiling tile and ceiling grid. HEPA vacuum and remove debris from the ceiling

Clean PVC condensate drain line.

Room 8

Locker Room Foyer

No mold rodent dropping only

Remove and replace in kind 48 square feet of ceiling tile and ceiling grid. HEPA vacuum rodent droppings and debris in ceiling plenum

Room 9 Locker Room

Remove and replace in kind 80 square feet of ceiling tile and ceiling grid. HEPA vacuum rodent droppings and debris in ceiling plenum (24 square feet).

Room 10

Locker Room

Remove and replace in kind 108 square of ceiling tile and ceiling grid. HEPA vacuum and remove debris from the ceiling

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Room 11

Main Larva room (sifting room)

Air supply and return vents

Un-Insulated and insulated pipe

Remove and replace exhaust vents

(1800 square feet) ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings and remove debris from plenum space.

Clean all mold-affecting piping in the ceiling plenum and remove and replace all duct and piping insulation.

Room 14

Larval Room #2

Vinyl ceiling paneling

Door frame/wallboard

Clean or remove approximately 60-90 square feet of fixed ceiling vinyl panels (note mold is distributed not localized).

Remove and replace air supply vent

Remove mold impacted wallboard at door and clean mold from door frame area 5 linear feet

Room 15

Larval Room #3

Vinyl ceiling paneling

Door frame/wallboard

Clean or remove approximately 6-12 square feet of fixed ceiling vinyl panels (note mold is distributed not localized).

Remove and replace air supply vent

Remove mold impacted wallboard at door and clean mold from door frame area 5 linear feet

Room 19 Infest room

(120 square feet) ceiling tiles. Clean or replace ceiling tile grid.

plenum space. (600 square feet).

Room 20

Larva Wash Room ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings, mold. and remove debris from plenum space. (400 square feet).

plenum space-400 square feet

Room 21 and 22 Mechanical Boiler room and adjacent Mechanical

Room hall

Wallboard and vinyl base cove

Remove approximately 80 square feet of wallboard (36 LF 2 feet high and 8 square feet of upper wall area wallboard).

Remove and replace in kind 36 linear feet of baseboard and wallboard to a height of 2 feet. Remove and replace in kind 4 square feet of upper wallboard

Room 24 Colony Bubbling

Room ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings and remove debris from plenum space. (200 square feet).

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Room 32 Red Room

Air supply vents

Air Handler unit pvc piping

Remove and replace two air supply vents

(128 square feet) ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings and remove mold and debris from the ceiling plenum space.

Air Handler suspended in ceiling plenum space- HEPA vacuum and surface clean exterior and interior including primary and secondary condensation pans evaporator coils, air filter housing, fan, motor, and lining-housing areas.

Clean pvc condensation drain line- approximately 10 linear feet

Room 33 Dump and Dye room

(200 square feet) ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings and remove mold and debris from the ceiling plenum space.

Room 34 Vacuum Radiation

Room/Storage

Air supply vent

(70 square feet) ceiling tiles. Clean or replace ceiling tile grid.

HEPA vacuum rodent droppings and remove mold and debris from the ceiling plenum space.

Room 35

Irradiation office

Insulation

(96 square feet) ceiling tiles. Clean or replace ceiling tile grid.

HEPA vacuum rodent droppings and remove mold and debris from the ceiling plenum space.

Replace all fiberglass insulation- 96 square feet

Room 37

Sausage room

Insulation

(144 square feet) ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings and remove mold and debris from the ceiling plenum space.

Replace all fiberglass insulation- 144 square feet

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Room 38 Irradiation Room

(192 square feet) ceiling tiles. Clean or replace ceiling tile grid. HEPA vacuum rodent droppings and debris from the ceiling plenum space.

Room 39

ERF Receiving

(192 square feet) ceiling tiles. Clean or replace ceiling tile grid.

HEPA vacuum rodent droppings and remove debris from the

Room 41, 41A, 41B

Main ERF Room, office, ERF rest rooms, Air supply and return air vents

Remove and replace air supply vents, return air vents, and exhaust vents.

Ceiling tile and grid - Remove, discard and replace in kind all (1620 square feet) ceiling tiles. Clean or replace ceiling tile grid.

HEPA vacuum rodent droppings and remove debris from the

Remove and replace all duct and piping insulation.

Room 42 QC Room

(100 square feet) ceiling tiles. Clean or replace ceiling tile grid.

Room 43 Larvae Manager office

(100 square feet) ceiling tiles. Clean or replace ceiling tile grid.

Room 44 restroom

Air exhaust vents

(25 square feet) ceiling tiles. Clean or replace ceiling tile grid.

Room 45 restroom

Air exhaust vents

(25 square feet) ceiling tiles. Clean or replace ceiling tile grid.

ceiling plenum space

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Removal surfaces: The contractor shall clean and treat mold removal surfaces following the EPA’s guidelines. The contractor must provide the specific product names of chemicals intended to be used along with MSDS’s and product data sheets. Removal shall continue in all directions until all visible mold contamination has been identified and removed.

HEPA Vacuuming: All walls, ceilings, and flooring throughout the contained area shall be thoroughly HEPA-vacuumed, and wet-wiped with a mild detergent solution or EPA approved biocide.

HEPA Vacuum machines shall be cleaned prior to mobilizing on site and seals shall be inspected to determine there is no air leakage.

HEPA Filtered Negative Air Machines: These shall be placed inside the contained areas and outside the contained areas to lower the ambient spore count. HEPA negative air machines shall be cleaned prior to mobilizing on site and pre and intermediate filters shall be new. Seals shall be inspected to determine there is no air leakage

According to the Environmental Protection Agency (EPA) “Mold Remediation in Schools and Commercial Buildings”, a Large Size Mold Remediation Project is defined as one where the total affected surface area is greater than 100 square feet. A Medium Size Mold Remediation Project is defined as one where the total affected surface area is less than 100 square feet but greater than 10 square feet, and a Small Size Mold Remediation Project is defined as one where the total affected surface area is less than 10 square feet. The total amount of mold that has to be remediated is well over 100 square feet but since the mold is not contiguous and less than 25 square feet in several locations, the work can be performed using EPA procedures for Large, Medium, and Small Scale recommendations based upon the amount of mold identified in each location. The procedures outlined by the EPA and the Texas Department of State Health Services (TDSHS) must be adhered

to. EPA Guidelines for Remediating Building Materials with Mold Growth can be found in the Appendix.

It should be noted that the EPA Guidelines are recommended practice and do not necessarily take into account factors such as the occupant density of the areas undergoing remediation, overall perception and sensitivity of the workplace, ect. Consequently, the extent of containment desired within the mold remediation work plan will ultimately be based upon professional judgment of the FOH mold consultant representative overseeing each project to determine prudent levels of containment and other measures for each situation, particularly as the remediation site size increases and the potential for exposure to building occupants and health effects increase.

The contractor performing the work shall construct full containments as defined by the EPA and outlined in Section VI of this report for the following areas: Room 1 Office/meeting room, Room 2 Admin hall, Room 3 Admin office, Room 5 Women restroom, Room 6 Men restroom, Room 7 Locker room hall, Room 10 locker room, Room 11 Larva Sifting room, Room 20 Larva Wash room, Room 21 mechanical boiler room, Room 22 Mechanical boiler room, Room 32 Red room, Room 34 Vacuum Radiation Room/Storage. Room 35 Irradiation office, Room 37 Sausage room, 41 ERF Main room, Room 41A ERF restroom, and Room 41B ERF storage. Remaining areas limited containments and small scale mold remediation procedures can be used Following the completion of the containment and establishment of differential pressure, all activities involving the disturbance of mold-contaminated materials shall be performed following TDSHS and EPA approved remediation methods.

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Personal Protective Equipment (PPE) shall be utilized by the contractor as defined below.

V. PERSONNEL REQUIREMENTS

Personal Protective Equipment (PPE):

All workers assigned to the project shall be trained to work in areas where there is potential airborne and surface fungal contamination and trained in the use of the specific remediation procedures within this specification. They shall be trained in accordance with the Hazard Communication Standard 1910.1200.

Personnel shall be medically fit to wear a negative pressure respirator and be covered under a Respiratory Protection Program per OSHA 1910.134. Specific PPE that will be utilized during the remediation should be identified in the site specific work plan.

Tyvek (or equivalent) disposal suits during all removal activities. Headgear, goggles, foot covers, and gloves must be worn at all times.

Adequate medical and first aid services shall be provided by the remediation contractor during the project to handle medical emergencies

Minimum: Gloves, N-95 respirator, goggles/eye protection Limited: Gloves, N-95 respirator or half-face respirator with HEPA filter, disposable overalls, goggles/eye protection Full: Gloves, disposable full body clothing, head gear, foot coverings, full-face respirator with HEPA filter

VI. CONTRACTOR SUBMITTALS:

The Contractor shall submit a detailed work plan of action indicating how all areas of the specification will be implemented.

The Contractor shall submit a detailed schedule for implementation of specification.

Prior to submitting this schedule, all parties shall be consulted to authorized work areas and work dates.

The Contractor shall submit drawings of the work area setup.

The Contractor shall submit Safety Data Sheets (MSDS) for all materials used to implement this specification. All SDSs shall be submitted for approval prior to implementation of this specification.

The Contractor shall submit an Emergency Plan, including emergency procedures and telephone numbers.

TDSHS licensing – Mold Remediation Contractor and Mold Remediation Company, TDSHS

Worker registration.

All submittals shall be approved prior to implementation of specifications by The FOH

Mold Assessor representative.

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VII. CONTAINMENT CONSTRUCTION:

Remediation areas shall be cleaned with a vacuum equipped with a High Efficiency Particulate Air (HEPA) filter prior to construction of containment(s).

All plastic sheeting used in the project shall be 6-mil flame-retardant polyethylene sheeting, hereafter referred to as 'poly'.

HVAC supply and return vents within containments shall be sealed with poly to prevent entrainment of dust and mold spores.

All penetrations in the containment including the false wall barrier installed between the affected area inside the containment and area outside containment shall be sealed with poly secured with duct tape or other means to create critical barriers.

A negative pressure full containment shall be constructed as defined by the EPA Guidelines for Remediating Building Materials with Mold Growth. Complete isolation of remediation area from other areas is required.

Containments shall be constructed using polyethylene sheeting from the ceiling to the floor around\affected areas. Containment size should allow sufficient room for remediation workers to effectively carry out the remediation. The containment shall include internal walls, and floor. The containment may have to extend above the lay-in ceiling tile in order to seal the top of the wall cavity to prevent mold impacted materials disturbed during the remediation from migrating into the plenum air space above the ceiling.

A single stage decontamination unit (decon) shall be provided for workers primarily to remove PPE and double bag waste removed from the containment area. The decontamination unit should have double flapped entry/exit curtains (air locks) or a zippered entry/exit. This structure is principle used to prevent unnecessary contamination of areas adjacent to containment.

Signs advising that a mold remediation project is in progress shall be displayed at all entrances to remediation areas adjacent to occupied areas of the building. The sign shall be a least eight (8) inches by ten (10) inches in size and shall bear the words “NOTICE:

Mold Remediation in Progress” in black on yellow background. The text of the sign must be legible from a distance of ten (10) feet. (Texas signage)

High Efficiency Particulate Air (HEPA) filter exhausted negative air units shall be used to clean (filter) and remove air from the remediation area during remediation. An exchange rate for the remediation areas must be at least four to six complete air changes per hour, and negative pressure must be maintained at .02”w.g. until the containment passes a visual clearance by the designated GSA Health and Safety representative. Negative pressure shall be demonstrated throughout the remediation with the use of manometer or similar device.

To prevent containments from collapsing due to too high of a negative pressure, a makeup air-port can be constructed with an inline air filter. The makeup air-port should be located at the furthest point from the HEPA filtration unit to allow for maximum air flow (mixing) and to prevent short circuiting of makeup air into the HEPA exhaust.

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Moore Airbase Building 6407

If feasible, the exhaust stream of the High Particulate Air (HEPA) filter- negative air unit within containment should be exhausted to the outdoors. If this is not possible due to building security requirements or other concerns, alternatively; the exhaust can be doubled scrubbed through an additional HEPA filtration unit and exhaust into an adjacent area of the building.

VIII. REMOVAL:

All contaminated building materials/components, and other contaminated materials to be removed, shall be misted with a mild detergent solution during removal or EPA approved biocide. All materials shall be removed utilizing dustless methods to minimize generation of dust and spore release. The materials (including disposable cloths shall be promptly removed and placed in double 6-mil poly bags. The bags shall be sealed with the use of duct tape and disposed of as contaminated waste.

Inside the containment, all interior poly walls and contaminated building materials/components and cavities, shall be wetted with a mild detergent solution or EPA approved biocide and damp wiped with disposable absorbent towels or similar disposable materials. Disposable materials shall be promptly removed and placed in double 6 ml poly bags or wrapped with double layers of poly then sealed with the use of duct tape. Dispose of bagged materials as contaminated waste.

After obtaining visual and air clearances all remediated exposed wall cavities and surface cleaned ceiling tiles shall be coated with an anti-microbial encapsulate such as Fosters 40-20.

If water damage or fungal growth is discovered in areas outside the work scope of this project elsewhere in the facility, this should be brought to the attention of FOH Health and Safety representative immediately.

IX. CLEAN-UP OF CONTAINMENT SUBSTRATES

HEPA vacuum all interior surfaces to remove loose contamination.

Scrub off any remaining visible contamination with a stiff brush while using a mild detergent solution.

HEPA vacuum the surface again to remove loosened material.

Wipe the surface with a damp sponge wetted with a mild detergent solution.

Wipe up any visible moisture that has accumulated due to the cleaning process.

Vacuum the surface with a wet vacuum.

X. WASTE DISPOSAL:

All contaminated materials and debris must be promptly removed in 6-mil poly bags or wrapped with layers of poly sealed with the use of duct tape. All protective clothing and

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Moore Airbase Building 6407 removed barriers shall be placed in double 6-mil poly bags or wrapped with double layers of poly sealed with the use of duct tape and disposed of as contaminated waste.

All bags shall be wet wiped and/or HEPA vacuumed prior to removal from facility.

All waste shall be stored in 6-mil poly lined storage vehicles. On site storage vehicles must be secured and locked at all times.

All waste shall be promptly disposed of off-site at a municipal landfill.

XII. CLEAN-UP OF CONTAINMENT

Remove all visible debris from the containment area. The entire containment area must be HEPA-vacuumed…